Modern ships use the electromagnetic Log have been less.
现代船舶上使用电磁计程仪的已较少。
With the electromagnetic Log compared with high accuracy, to measure absolute speed, range, to measure the ship horizontal speed advantages.
它与电磁计程仪比较具有测量精度高；能够测量绝对航速、航程；能够测量船舶横向移动速度等优点。
Electromagnetic Log is a relatively Log, and for single Log, the only measurement of the vertical ship relative speed of water, range, not conducive to the manipulation of large ships.
电磁计程仪是一种相对计程仪，且为单轴计程仪，只能测量船舶相对水的纵向航速、航程，不利于大型船舶的操纵。
A log similar to a dual induction log but made by an electromagnetic propagation tool built into a drill collar.
与双感应测井类似的一种测井方法，用安装在钻铤中的电磁传播仪进行测量。
A log similar to a dual induction log but made by an electromagnetic propagation tool built into a drill collar.
与双感应测井类似的一种测井方法，用安装在钻铤中的电磁传播仪进行测量。
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